Well, I've yet to see an example of a 'Fixed Timeline' in the series. If it were true, then the Split Timeline would virtually be impossible according to HH's logic. Parts of OoA and SS time travel kinda represent the Dynamic time travel theorem. I suspect this exception to the Multiverse rules played out at OoT's juncture were bent due to divine intervention... Hence the paradox effect that unfortunately rippled into the CT when Ganondorf received the ToP.
Oh I thought you just meant in general, not pretaining to the Zelda series really. Yeah the Zelda series sort of sticks to “Dynamic timeline theory” and “Multi-verse theory”. “Dynamic timeline theory” never gets executed correctly but sometimes it should happen with the paradoxes that are created in most games (especially with Skyward Sword).